• Rachis

    Pronunciation

    • UK IPA: /ˈɹeɪkɪs/

    Alternative forms

    Origin

    From New Latin, from Ancient Greek ῥάχις ("spine, ridge").

    Full definition of rachis

    Noun

    rachis

    (plural rachises or rachides)
    1. (botany) The main shaft of either a compound leaf, head of grain, or fern frond.
    2. (zoology, anatomy) The spine or the vertebrae of the spine.
    3. (ornithology) The central shaft of a feather.

    Usage notes

    The plural form rachides is technically erroneous, being based on a mistaken impression of the Ancient Greek stem.

    Anagrams

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